Edit default open case email answer

Hi! I was reading some guides but i can't find how to change the default template for email notification of open case...

"Dear XXXX,

This is an acknowledgement mail for your request. Your request has been created with id 19. The title of the request is : test. The status of the request can be tracked at http://127.0.0.1//WorkOrder.do?woMode=viewWO&woID=19 .

Please get back to us for any further clarifications.

regards,
Sys Admin team. "

Because we are in a spanish speaking country, i would like to translate this message. How can i do it?

Regards,

Omar.